I'm a beginner that's getting back into film photography after many years. I just received scans of my negatives and noticed some of them have streaking while others do not. I feel like this may have happened when the film was developed but I'm unsure. Perhaps it's the camera, the film or something I did? The film is Kodak Tri-x 400.  

![enter image description here][1]

![enter image description here][2]


  [1]: https://i.sstatic.net/ByEFu.png
  [2]: https://i.sstatic.net/5EpgM.png